STUDIES ON CHANGES OF SERUM PROGESTERONE LEVEL OF SABLES IN THE PREGNANCY PERIOD
TONG Yuren, SONG Jianhua, MEN Taoyan, WANG Guosen, LI Chunyi, XIAO Yongjun, GUO Yongjia, GU Haijun
. 1993, (1): 21 -24 .